SM-6 Blk I/IA vs Fateh-110: Cost-Exchange Ratio & Combat Analysis
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2026-03-21
3 min read
Overview
This analysis compares the SM-6 Blk I/IA, a US Multi-role BMD/AAW system costing $4.9M per unit, against the Fateh-110, an Iranian SRBM costing $300K per unit. The cost-exchange ratio of 16.3:1 favors the attacker — meaning it costs the defender 16.3x more to intercept than the missile cost Iran to produce. At Operation Epic Fury burn rates of 6/day, the SM-6 Blk I/IA inventory of 750 units faces depletion in approximately 125 days. Multi-mission missile: anti-air warfare, ballistic missile defense, and anti-surface strike Solid-fueled SRBM family — Fateh-110/313/360 variants with 300-400km range
Side-by-Side Specifications
| Dimension | Sm 6 Blk I Ia | Fateh 110 |
|---|
| Unit Cost |
$4.9M |
$300K |
| Cost-Exchange Ratio |
16.3:1 |
16.3:1 |
| Range |
Multi-role BMD/AAW |
400 km |
| Inventory |
~750 |
~500 |
| Annual Production |
165/yr |
— |
| Role |
Multi-role BMD/AAW |
SRBM |
| Manufacturer |
RTX/Raytheon |
Iran / IRGC |
| Fuel |
Solid rocket |
— |
Head-to-Head Analysis
Cost-Exchange Economics
The SM-6 Blk I/IA costs $4.9M per unit while the Fateh-110 costs just $300K, creating a 16.3:1 cost-exchange ratio. Highly unfavorable for the defender. Extended engagements at this ratio are unsustainable. Iran can produce 16 Fateh-110 units for the price of a single SM-6 Blk I/IA interceptor.
The Fateh-110 has a 16.3:1 cost advantage over the SM-6 Blk I/IA. This asymmetry is a key factor in the conflict's economic sustainability.
Inventory & Depletion
Coalition forces have approximately 750 SM-6 Blk I/IA interceptors with annual production of 165 units. Iran maintains an estimated 500 Fateh-110 units. The SM-6 Blk I/IA is already 17% depleted vs operational requirements. At Operation Epic Fury burn rates of 6/day, the SM-6 Blk I/IA inventory of 750 units faces depletion in approximately 125 days.
Coalition holds an inventory advantage, but at 16.3:1 cost ratio, this is offset by economics.
Tactical Engagement
The SM-6 Blk I/IA engages the Fateh-110 during the flight phase. At 400km range, the Fateh-110 is primarily a short-range threat. Triple mission. 200+ fired in Red Sea ops. Only dual AAW+BMD.
The SM-6 Blk I/IA is designed to counter threats like the Fateh-110, but sustained engagement at 16.3:1 cost ratios creates long-term sustainability challenges.
Scenario Analysis
Mass salvo of Fateh-110 missiles
In a saturation attack using Fateh-110 systems, the SM-6 Blk I/IA battery would need to engage multiple targets simultaneously. At $4.9M per interceptor, a salvo of 5 Fateh-110 missiles would cost $1.5M to launch but $24.5M to intercept.
Fateh-110
Extended conflict (30+ days)
Over 30 days of sustained combat, the SM-6 Blk I/IA inventory faces significant depletion pressure. Annual production of 165 units translates to just 0.5 per day — far below consumption rates during active operations. Meanwhile, Iran produces approximately 3.3 ballistic missiles and 6.7 drones per day.
Attacker (Iran) — production outpaces defender replenishment
Complementary Use
The SM-6 Blk I/IA should be integrated into a layered defense architecture, not relied upon as a standalone solution against Fateh-110 threats. Cost-effective lower-tier systems (Iron Dome at $80K, or Iron Beam laser at $2/shot) should handle cheaper threats when possible, preserving expensive SM-6 Blk I/IA interceptors for high-value targets.
Overall Verdict
The SM-6 Blk I/IA vs Fateh-110 matchup produces a 16.3:1 cost-exchange ratio favoring the attacker. This is one of the most economically asymmetric engagements in modern warfare. For sustained conflict planning, interceptor production ramp-up and cost-reduction programs are critical to maintaining defensive capability.
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